The act of a male going to the toilet to urinate(and sometimes pooing) and instead of washing his hands when finished, he instead exits the toilet and uses the same hand that was used to hold his junk(or wipe his ass) to also open doors. This leaves traces of his dick particles on all door handles he has touched for others to come along and touch.

Carlos: Eewww, I just saw Thiago leave the toilet before me without washing his hands and then re-enter the office building.
Geoff: Did he turn the door handle to get back in?
Carlos: Yeah!
Geoff: What a cunt! That's Dick door. Make sure you desanitize your hands